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Which Python code snippet correctly reads a sensor value on Raspberry Pi for real-time updates?

easy📝 Syntax Q12 of 15
Raspberry Pi - Web Server and API
Which Python code snippet correctly reads a sensor value on Raspberry Pi for real-time updates?
A<code>sensor_value = sensor.read()</code>
B<code>sensor_value == sensor.read()</code>
C<code>sensor.read = sensor_value()</code>
D<code>sensor_value := sensor.read</code>
Step-by-Step Solution
Solution:

  1. Step 1: Identify correct assignment syntax

    In Python, to assign a value from a function call, use single equals: variable = function().

  2. Step 2: Check each option

    sensor_value = sensor.read() uses correct assignment and function call syntax. Options B and C misuse operators or assignment. sensor_value := sensor.read uses walrus operator incorrectly without parentheses.

  3. Final Answer:

    sensor_value = sensor.read() -> Option A

  4. Quick Check:

    Assignment uses =, not == or := alone [OK]
Quick Trick: Use single = to assign function output to variable [OK]
Common Mistakes:
MISTAKES
  • Using == instead of = for assignment
  • Trying to assign function call incorrectly
  • Misusing walrus operator without parentheses

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